United States Stove C9947L User Manual
UNITED STATES
STOVE COMPANY
227 INDUSTRIAL PARK ROAD • P.O . BOX 151 • SOUTH PITTSB URG, TN. 37380 • (423)-837-2100
Natural Gas Model
C9947N
Propane (LPG) Gas Model
C9947L
Owner's Operation and Installation Manual
This appliance may be installed in an aftermarket* manufactured (mobile) home,
where not prohibited by state or local codes.
*Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer
This appliance is only for use with the type gas indicated on the rating plate. This appli-
ance is not convertible for use with other gases.
This is an unvented gas-fired
heater. It uses air (oxygen) from
the room in which it is installed.
Provisions for adequate combustion and ventilation air must be
provided. Refer to "Adequate
Combustion And Ventilation Air"
on page(s) 6 of this manual.
WARNING:
Do not use a blower insert,
heat exchanger insert or other
accessories not approved
for use with this heater.
Save this manual for
future reference.
WARNING: If the information in this manual is not
followed exactly, a fire or explosion may result
causing property damage, personal injury, or loss of
life.
~Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any other
appliance.
~WHAT TO DO IF Y OU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not
use any phone in your building.
• Immediately call your gas supplier from a
neighbor's phone. Follow the gas supplier's
instructions.
• If you cannot reach y our gas supplier, call
the fire department.
~Installation and service must be performed by a
qualified installer, service agency, or the gas supplier.
851371B 6/00
TABLE OF CONTENTS
SECTION PAGE
IMPORTANT SAFETY INFORMA TION.......................................................3-4
PRODUCT FEATURES..................................................................................4
9947 SPECIFICA TIONS.................................................................................5
CONTENTS....................................................................................................5
ITEMS REQUIRED FOR INSTALLATION......................................................6
INSTALLATION...............................................................................................7
MANTEL CLEARANCES................................................................................8
GAS CONNECTION..................................................................................9-10
GAS PRESSURE CHECK.............................................................................10
FRONT SCREEN REMOVAL.......................................................................11
LOG ASSEMBLY...........................................................................................11
OPERA TING INSTR UCTIONS................................................................12-14
CLEANING / SER VICING.......................................................................14-15
FLAME APPEARANCE................................................................................15
PARTS LIST FOR HEATER ASSEMBL Y.................................................16-17
PARTS LIST FOR BURNER AND LOG ASSEMBLY...............................18-19
TROUBLE SHOOTING...........................................................................20-21
OPTIONAL EQUIPMENT ..............................................................................22
WIRING DIAGRAMS...............................................................................23-25
NOTES..........................................................................................................26
LIMITED WARRANTY POLICY ....................................................................27
NOTICE
Installation and repair must be done by a qualified service person. The appliance should be inspected before use and at least annually by a professional service person. More frequent cleaning
may be required due to excessive lint from carpeting, bedding material, etc. It is imperative that
control compartments, burners and circulating air passageways of the appliance be kept clean.
2
IMPORTANT SAFETY INFORMATION
INSTALLER: Please leave these instructions with the owner.
OWNER: Please retain these instructions for future reference.
IMPORTANT: Read these instructions carefully before installing or trying to operate this heater.
WARNING: Any change to this heater or its controls can be dangerous. Improper installation or
use of the heater can cause serious injury or death from fire, burns, explosion or carbon monoxide
poisoning.
1. CARBON MONOXIDE POISONING: Early signs of carbon monoxide poisoning are similar to
the flu with headaches, dizziness and/or nausea. If you have these signs, obtain fresh air
immediately. Have the heater serviced as it may not be operating properly.
2. The installation must conform with local codes or , in the absence of local codes, with the National
Fuel Gas Code, ANSI Z223.1.
2. This heater shall not be installed in a bedroom or bathroom.
4. WARNING: Improper installation, adjustment, alteration, ser vice or maintenance can cause
injury or property damage. Refer to this owner's manual. Installation and service must be
performed by a qualified installer, service agency or the gas supplier.
5. To prevent malfunction and/or sooting, a vent-free gas heater should be cleaned at least
annually by a professional service person. More frequent cleaning may be required due to
excessive lint from carpeting, etc. It is imperative that control compartments, burners and
circulating air passageways be kept clean.
6.
Correct placement of the ceramic fiber logs is necessary to avoid problems with sooting. Sooting
can settle on surfaces outside the heater and cause discoloration. See the appropriate sections
of this manual for instructions.
7.
WARNING: Do not allo w fans to b low directly into the fireplace . A v oid an y drafts that alter burner
flame patterns. Do not place a blower inside burn area of firebox. Ceiling fans may create drafts
that alter burner flame patterns. Sooting and improper burning will occur.
8. This is a vent-free gas fired heater. It uses air (oxygen) from the room in which it is installed.
Provisions for adequate combustion and ventilation air must be provided. Refer to installation
guidelines.
9.
Children and adults should be alerted to the hazard of high surface temperature and should stay
away to avoid burns or clothing ignition.
10.
Young children should be carefully super vised when they are in the same room with the
appliance.
11. Do not place clothing or other flammable material near the appliance.
3
IMPORTANT SAFETY INFORMATION
13. Keep appliance area clear and free from combustible materials, gasoline and other flammable
vapors and liquids.
15. Any safety screen or guard removed for servicing, must be replaced prior to heater operation.
16.
This vent-free gas heater is intended to be smokeless. If logs appear to smoke, turn off the
heater and call a qualified service person.
during the first four hours of operation.
17. Input ratings are shown in BTU per hour and are for elevations up to 2,000 feet. For elevations
above 2,000 feet, input ratings s
Refer to the National Fuel Gas Code.
18. The appliance and its appliance main gas shut off valve must be disconnected from the gas
supply piping
2 psig (3.5 kPa).
19.
The appliance must be isolated from the gas supply piping system by closing its equipment
shut off valve during any pressure testing of the gas supply piping system at test pressures
equal to or less than 1/2 psig (3.5 kPa).
system during any pressure testing of that system at test pressures in excess of 1/
hould be reduced 4 percent per 1,000 feet above sea level.
Initial burn off may cause slight smoke and odor
CONTINUED
20. Do not use this heater if any part has been under water. Immediately call a qualified service
technician to inspect the room heater and to replace any part of the control system and any
gas control that has been under water.
PRODUCT FEATURES
Features:
• Heating Efficiency - 99.9%
• Wide BTU Range: 27,000-39,900.
• Safe Operation -
Oxygen Depletion Sensor (ODS).
• Fibre Ceramic Logs.
• 120 CFM Blower
• Push-Button Piezo Ignitor.
• Clean Operation.
• Easy Operation.
• Heats up to 1,200 square feet.
• Optional Remote Control, Wall Switch
and Wall Thermostat Kits
9947 Vent-free Gas Pedestal Heater
4
Figure 1.
9947 SPECIFICATIONS
Natural Gas
Manifold Pressure Setting: 4" w.c.
Gas Inlet Pressure: Maximum 10-1/2" w.c.
Minimum 5" w.c.
Model Number Type Max BTU/Hr Min BTU/Hr of Burners
9947N Manual 39,900 27,000 1
9947L Manual 39,900 27,000 1
Controls - Main control has 4 positions:
1. OFF - All gas to the gas logs is shut off at the control
2. IGN - Piezo ignitor allows ignition of the pilot without the use of matches or batteries
3. PILOT - Valve position to light/maintain a standing pilot
4. ON - Gas flow to complete system.
HIGH / LOW Control - Infinite control :
Rotate knob clockwise to LOW, counter clockwise to HIGH.
Propane/LPG
Manifold Pressure Setting: 10" w.c.
Gas Inlet Pressure: Maximum 13" w.c.
Minimum 11" w.c.
Gas Rate Number
CONTENTS
9947L and 9947N Unvented Gas Heaters
1. Packet containing Homeowner's/Installation instructions.
2. Three (3) individually wrapped fiber ceramic logs , refer to installation instructions.
3. Unv ented gas heater.
CHECK THAT ALL LISTED PARTS HAVE BEEN RECEIVED
GLOVES ARE RECOMMENDED WHEN HANDLING CERAMIC FIBER
LOGS TO PREVENT SKIN IRRITATION FROM LOOSE FIBERS. LOGS
ARE FRAGILE, HANDLE WITH CARE.
Carefully inspect the contents for shipping damage and immediately inform
CAUTION
your dealer if any damage is found.
5
ITEMS REQUIRED FOR INSTALLATION
ITEMS REQUIRED FOR INSTALLATION
Ensure that the following items are available before proceeding with installation:
• External regulator (for propane/LPG only) • Manual cutoff valve
• Piping which complies with local codes • Sediment trap
• Pipe sealant approved for use with • Pipe wrench
propane / LPG (resistant to sulfur compounds)
CODES
Adhere to all local codes or in their absence, the latest edition of THE NATIONAL FUEL GAS CODE
ANSIZ223.1 or NFPA54 which can be obtained from:
American National Standards Institute, Inc. National Fire Protection Association, Inc.
1430 Broadway or Batterymarch Park
New York, NY 10018 Quincy, MA 02269
Due to high temperatures, do not install the heater:
• Where curtains, furniture, clothing or other flammable objects are less than
42" from the front of the heater.
• In high traffic areas.
• In windy or drafty areas.
WARNING
DO NOT PLA CE CLOTHING OF OTHER FLAMMABLE MATERIAL ON OR NEAR
THE APPLIANCE.
ADEQUATE COMBUSTION AND VENTILATION AIR
This heater shall not be installed in a confined space unless provisions are provided for adequate combustion and ventilation air.
(a) Walls and ceiling exposed to the outside atmosphere have a continuous water vapor retarded
with a rating of 1 perm (6 x 10 kg per pa-sec-m²) or less with openings gasketed or sealed , and
(b) Weather stripping has been added on openable windows and doors, and
(c) Caulking or sealants are applied to areas such as joints around window and door frames,
between sole plates and floors, between wall-ceiling joints, between wall panels, at penetrations
for plumbing, electrical, gas lines, and at other openings.
The National Fuel Gas Code defines a confined space as a space whose volume is less than 50 cubic feet
per 1,000 BTU per hour (4.8m³ per kw) of the aggregate input rating of all appliances installed in that space
and an unconfined space is defined as a space whose volume is not less than 50 cubic feet per 1,000 BTU
per hour (4.8m³ per kw) of the aggregate input rating of all appliances installed in that space. Rooms
communicating directly with the space in which the appliances are installed, through openings not furnished with doors, are considered a part of that unconfined space.
11
6
INSTALLATION
The following formula can be used to determine the maximum
heater rating per the definition of unconfined space:
BTU/HR = (L1+L2) Ft x (W) Ft x (H) Ft x 1000
50
Consider two connecting rooms with an open area between,
with the following dimensions:( See Fig. 2, Example)
L1=15-1/2 Ft., L2=12 Ft., W=12 ft., H=8Ft
50
=52800 BTU/HR
If there were a door between the two rooms the calculation would
be based only on the room with the heater.
BTU/HR=(15-1/2) x (12) x (8) x 1000
50
=29760 BTU/HR
When installing the appliance directly on carpeting, tile or other combustible
material, other than wood flooring, the appliance must be installed on a
metal or wood panel extending the full width and depth of the appliance.
WARNING
FIGURE 2.
If the area in which the heater may be operated is smaller than that defined as an
unconfined space or if the building is of unusually tight construction, provide
adequate combustion and ventilation air by one of the methods described in the
National Fuel Gas Code, ANSI Z223.1, Section 5.3, or applicable local codes.
WARNINGWARNING
Ensure the minimum clearances shown in FIGURE 3 are maintained for
accessibility for purposes of servicing and proper operation. Left and
right clearances are determined when facing the front of the heater.
Maintain these clearances
to ensure adequate space
around air opening for
proper operation.
Minimum clearances to
combustibles:
Top of heater...............................36"
Right Side of heater.....................15"
Left Side of heater.........................8"
Front of heater.............................42"
FIGURE 3. Minimum Clearances
Rear of heater...............................4"
7
MANTEL CLEARANCES
If placing a custom mantel above the heater, you must meet minimum clearances between
mantel shelf and the top of the heater.
If your installation does not meet the below minimum clearances, you must:
• Raise the mantel to an acceptable height, OR
• Remove the mantel.
MINIMUM MANTEL CLEARANCES
Figure 4.
UNDERSIDE OF
MANTEL SHELF
MANTEL SHELF
TOP OF HEATER
ALL MINIMUM
DISTANCES ARE
IN INCHES
DISTANCE TO
UNDERSIDE OF
MANTEL
BACK WALL
FLOOR
MINIMUM CLEARANCE
TO BACK WALL
8
GAS CONNECTION
A qualified gas appliance installer must connect the fireplace to the gas supply.
Consult all local codes.
NOTICE
Use new black iron or steel pipe only. Internally tinned copper tubing can be used
in some areas when permitted by local codes. Only use pipe of 1/2" or greater
diameter to allow full gas volume to heater. Excessive pressure loss will occur if the
pipe is too small.
A manual shutoff valve, union and plugged 1/8" NPT pressure tapping point must be
installed upstream of the heater (FIGURE 5).
CAUTION
A sediment trap must be installed upstream of the heater to prevent moisture and
contaminants from passing through the pipe to the heater controls and burners.
Failure to do so could prevent the heater from operating reliably (FIGURE 5).
IMPORTANT: Loosen the pipe adapter
TO HEATER
CONTROL VALVE
PIPE
COUPLING
SEDIMENT TRAP
STAINLESS
FLEXIBLE TUBE
PIPE
MANUAL
SHUTOFF VALVE
TEE JOINT
PIPE NIPPLE
CAP
on the flex tube before installing to the
system piping.
FIGURE 5. Gas Connection
CHECK GAS TYPE: The gas supply must be the same as stated on heater's rating plate. If the gas
supply is different, DO NOT INSTALL the heater. Contact your dealer for the correct model.
Connecting directly to an unregulated propane/LPG tank can cause an explosion.
WARNING
9
GAS CONNECTION
The gas inlet connection is 3/8" NPT,
made at the rear of the unit in the bottom
left-hand corner.
Test all gas joints from the gas meter to
the heater for leaks using soap and water
solution after completing connection. DO
NOT USE AN OPEN FLAME.
Gas Inlet Connection (3/8" NPT)
FIGURE 6. Rear View of 9947 Vent-Free Gas Heater
GAS PRESSURE CHECK
The heater regulator controls the burner pressure which should be checked at the pressure test point
located on the front of the main control and is accessible by removing the control panel on the right
side of the heater.
The pressure should be checked with the heater burning and the control set to high (HI).
The pressure regulator is preset and locked to avoid tampering. If the pressure is not as specified
in Product Specifications (Page 5), contact your dealer and replace the regulator.
10
FIGURE 7. Pressure Test Point Location
REMOVING FRONT SCREEN
REMOVING FRONT SCREEN: 1) Remove screw from the top of the screen (Fig. 8A). 2) Tilt the top of
the screen toward you slightly and lift the screen up out of the screen retainer (Fig. 8B). NOTE: To reinstall
the front screen, reverse steps 1 & 2.
FIG. 8A FIG. 8B
LOG ASSEMBLY
LOG POSITIONING
Do not handle these logs with your bare hands! Always wear gloves to prevent skin irritation from
ceramic fibers. After handling logs, wash your hands gently with soap and water to remove any
traces of fibers.
PROPER INSTALLATION SEQUENCE:
WARNING: Failure to position the
parts in accordance with these
diagrams or failure to use only
parts specifically approved with
this heater may result in property
damage or personal injury.
FIGURE 9. Log Set Assembly
The positioning of the logs is critical to the safe and clean operation of this
heater . Sooting and other pr oblems may result if the logs are not properl y
and firmly situated in the appliance. Never add additional logs or
embellishments such as pine cones, vermiculite or rock wool to the heater .
WARNING
11
OPERATING INSTRUCTIONS
Avoid any drafts that alter the burner flame patterns. Do not allow fans to blow directly into the heater.
Do not place a blower inside burn area of firebox. Ceiling fans may create drafts that alter burner
flame patterns. Sooting and improper burning will occur.
This vent-free gas heater is intended to be smokeless. If logs appear to smoke, turn off the heater
and call a qualified service person. Initial burn off may cause slight smoke and odor during the first
four hours of operation.
FOR YOUR SAFETY READ BEFORE LIGHTING
WARNING: If you do not follow these instructions exactly, a fire or
explosion may result causing property damage, personal injury or loss of
life.
WARNING
A.
This appliance is equipped with an ignition device (Piezo) which automatically lights the pilot.
If Piezo fails, then light the pilot using matches. Refer to match lighting instructions (page 14).
When lighting the pilot, follow these instructions exactly.
B.
BEFORE LIGHTING smell all around the appliance area for gas. Be sure to smell next to the
floor because some gas is heavier than air and will settle on the floor.
WHAT TO DO IF YOU SMELL GAS
• Do not attempt to light any appliance.
• Do not touch any electric switch; do not use any phone in your building.
• Immediately call your gas supplier from a neighbor's phone. Follow the gas supplier's
instructions.
• If you cannot reach your gas supplier, call the fire department.
C.
Use only your hand to push in or turn the gas control knob. Never use tools. If the knob will not
push in or turn by hand, don't try to repair it, call a qualified service technician. Force or attempted
repair may result in a fire or explosion.
D.
Do not use this appliance if any part has been under water. Immediately call a qualified service
technician to inspect the appliance and to replace any part of the control system and any gas
control which has been under water.
FOR YOUR SAFETY
Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other
appliance.
12
OPERATING INSTRUCTIONS
LIGHTING INSTRUCTIONS
1. STOP! Read the safety information on the
previous page.
2. Set the thermostat to lowest setting.
2. Turn off all electrical power and open the
access door.
3. Push in gas control (B) slightly and turn clock
wise to "OFF".
5. Push "ON / OFF" switch to "OFF" position.
B
D
A
C
NOTE: Knob cannot be turned from "PILOT" to
"OFF" unless knob is pushed in slightly. Do not
force.
6. Wait five (5) minutes to clear out any gas.
Then smell for gas, including near the floor. If
you smell gas, STOP! Follow "B" in the
safety information on the previous page. If
you don't smell gas, go on to the next step.
7. Depress knob (B) and turn gas control knob counter
clockwise
8. Push in knob (B) all the way and hold in.
Immediately light the pilot by pushing in on
the piezo button (A). Continue to hold the
control knob in for about one (1) minute after
the pilot
up. Pilot should remain lit. If it goes out,
repeat steps 4 through 8.
to "Pilot".
is lit. Release knob and it will pop back
TOP VIEW OF BURNER ASSEMBLY
If the knob does not pop up when released, stop
and immediately call your service technician or
gas
supplier. If the pilot will not stay lit after
several tries, turn control knob to "OFF" and
call your gas supplier.
9. Turn valve knob clockwise to "ON".
10. Wait about one minute then turn burner
switch (D) to "ON". It will take a few minutes
for the thermopile located on top of the pilot
to heat up.
NOTE: If unit is equipped with remote "on-off"
wall switch, switch must be in "on" position for
burner to light.
11. Adjust flame height with the high-low knob (C).
12. Turn on all electrical power to the appliance.
13. Close access door.
NOTE: It is normal for the new heater to give off
some odor the first time it is burned. This is due to
the curing of the paint and any undetected oil from
the manufacturing process.
It is recommended that you burn your new heater
for at least two (2) hours the first time you use it. If
optional fan kit is installed, leave it turned off for
the break in period.
TURN OFF GAS TO APPLIANCE
1. Open access door.
2. Turn switch (D) to "OFF"
3. Unplug all electric power if service is to be performed.
4. Push in gas control knob slightly and turn clockwise to the "OFF" position.
5. Close access door.
13
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